VIR Vulnerability Intelligence Relay

CVE-2017-16943

critical
Published 2017-11-25 · Modified 2026-05-13
💬 Discuss on Community ✚ Propose mitigation
CVSS v3
9.8
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4 NEW
—
not yet in upstream
VIR risk
9.8

Description

The receive_msg function in receive.c in the SMTP daemon in Exim 4.88 and 4.89 allows remote attackers to execute arbitrary code or cause a denial of service (use-after-free) via vectors involving BDAT commands.

Predictions

Exploit likelihood
97%
Patch ETA
—

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

No mitigations published for this CVE yet.

The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.

✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here with source_tier=community-verified.

OS impact
debian Debian Mixed 6 releases
VersionStatusFixed in
trixie Fixed 4.89-12
sid Fixed 4.89-12
forky Fixed 4.89-12
bullseye Fixed 4.89-12
bookworm Fixed 4.89-12
9.0 Affected —
arch Arch Fixed 1 release
VersionStatusFixed in
— Fixed 4.89.1-1

Application impact
VendorProductVersionsFixed
eximexim4.88
eximexim4.89

References

CWEs

CWE-416

Community-verified mitigations for this CVE will appear above when contributors publish them.

Verify integrity in audit chain (admin only). AS-IS.